title: The combined contraceptive vaginal ring, NuvaRing, and tampon co-usage.
mesh_terms: D000282:Administration, Intravaginal; D000284:Administration, Oral; D000328:Adult; D003267:Contraception / Q000379:methods*; D003271:Contraceptive Agents, Female / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics; D003274:Contraceptive Devices, Female; D018592:Cross-Over Studies; D017135:Desogestrel / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics; D004333:Drug Administration Routes; D004334:Drug Administration Schedule; D004997:Ethinyl Estradiol / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics; D005260:Female; D006801:Humans; D013630:Tampons, Surgical
chemical_list: D003271:Contraceptive Agents, Female; C044815:etonogestrel; D004997:Ethinyl Estradiol; D017135:Desogestrel